Forum Discussion

JL0101's avatar
JL0101
Helper II
2 years ago
Solved

Finding a previous value based on another column

I have the following measure below, however it just returns blank when I insert the measure into a prexisting table, any idea why?
 
ModelA-Weight Difference1
a 
b 
c 
d 
e 
 
 
A-Weight Difference1 =
VAR PreviousRev =
    CALCULATE ( MAX ( 'Full_Rebar'[C-Revision Number] )-1)
RETURN
    CALCULATE ( MAX ( 'Full_Rebar'[weight_calculated ), 'Full_Rebar'[C-Revision Number] = PreviousRev )
 
would it have anything todo with filter context? as there is another measure in the table too.
Need Help
  • Anonymous's avatar
    Anonymous
    2 years ago

    PhilipTreacy Thanks for your contribution on this thread.

    Hi JL0101 ,

    You can update the formula of measure [A-Weight Difference] as below and check if it can return the expected result.

    A-Weight Difference =
VAR _Revnum =
    MAX ( 'Full_Rebar'[C-Revision Number] )
VAR PreviousRev =
    CALCULATE (
        MAX ( 'Full_Rebar'[C-Revision Number] ),
        FILTER (
            ALLSELECTED ( 'Full_Rebar' ),
            'Full_Rebar'[C-Revision Number] < _Revnum
        )
    )
VAR _preweight =
    CALCULATE (
        SUM ( 'Full_Rebar'[weight_calculated] ),
        FILTER (
            ALLSELECTED ( 'Full_Rebar' ),
            'Full_Rebar'[C-Revision Number] = PreviousRev
        )
    )
RETURN
    SUM ( 'Full_Rebar'[weight_calculated] ) - _preweight

    If the above ones can't help you figure out, please provide some raw data in your table 'Full_Rebar' (exclude sensitive data) with Text format and your expected result with backend logic and special examples. It would be helpful to find out the solution. You can refer the following link to share the required info:

    How to provide sample data in the Power BI Forum

     

    And it is better if you can share a simplified pbix file. You can refer the following link to upload the file to the community. Thank you.

    How to upload PBI in Community

    Best Regards

2 Replies

  • PhilipTreacy's avatar
    PhilipTreacy
    Super User
    2 years ago

    JL0101 

     

    Please provide data and excpected result.  I can't tell from what you have provided what data you are using or what you expect is the correct result.

     

    Regards

     

    Phil

  • Anonymous's avatar
    Anonymous
    Not applicable
    2 years ago

    PhilipTreacy Thanks for your contribution on this thread.

    Hi JL0101 ,

    You can update the formula of measure [A-Weight Difference] as below and check if it can return the expected result.

    A-Weight Difference =
VAR _Revnum =
    MAX ( 'Full_Rebar'[C-Revision Number] )
VAR PreviousRev =
    CALCULATE (
        MAX ( 'Full_Rebar'[C-Revision Number] ),
        FILTER (
            ALLSELECTED ( 'Full_Rebar' ),
            'Full_Rebar'[C-Revision Number] < _Revnum
        )
    )
VAR _preweight =
    CALCULATE (
        SUM ( 'Full_Rebar'[weight_calculated] ),
        FILTER (
            ALLSELECTED ( 'Full_Rebar' ),
            'Full_Rebar'[C-Revision Number] = PreviousRev
        )
    )
RETURN
    SUM ( 'Full_Rebar'[weight_calculated] ) - _preweight

    If the above ones can't help you figure out, please provide some raw data in your table 'Full_Rebar' (exclude sensitive data) with Text format and your expected result with backend logic and special examples. It would be helpful to find out the solution. You can refer the following link to share the required info:

    How to provide sample data in the Power BI Forum

     

    And it is better if you can share a simplified pbix file. You can refer the following link to upload the file to the community. Thank you.

    How to upload PBI in Community

    Best Regards